A committee set up by a corporation, labor union, or interest group that raises and spends campaign money from voluntary donations

A person who tries to influence legislation on behalf of an interest group

Something of value one cannot get without joining an organization

The social rewards (sense of pleasure, status, or companionship) that lead people to join political organizations

Money or things valued in monetary terms

A benefit that comes from serving a cause or principle

Political organizations that attract members by appealing to their political convictions or principles

A political organization whose goals will principally benefit nonmembers

A widely shared demand for change in some aspect of the social or political order

A signal telling a legislator what values are at stake in a vote and how that issue fits into his or her own political views on party agenda

Assessments of a representative's voting record on issues important to an interest group

A provision in a law that provides a direct benefit to a client without the benefit having been reviewed on the merits by all of Congress